Search: onr:"swepub:oai:DiVA.org:uu-127372" >
gamma-Mn at the bor...
gamma-Mn at the border between weak and strong correlations
-
- Di Marco, Igor (author)
- Uppsala universitet,Institutionen för fysik och materialvetenskap
-
Minar, J (author)
-
Braun, J (author)
-
show more...
-
Katsnelson, M. I. (author)
-
Grechnev, A (author)
-
Ebert, H (author)
-
Lichtenstein, I (author)
-
- Eriksson, Olle (author)
- Uppsala universitet,Institutionen för fysik och materialvetenskap
-
show less...
-
(creator_code:org_t)
- 2009-11-20
- 2009
- English.
-
In: European Physical Journal B. - : Springer Science and Business Media LLC. - 1434-6028 .- 1434-6036. ; 72:4, s. 473-478
- Related links:
-
http://arxiv.org/pdf...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- We investigate the role of magnetic fluctuations in the spectral properties of paramagnetic gamma-Mn. Two methods are employed. The Local Density Approximation plus Dynamical Mean-Field Theory together with the numerically exact quantum Monte-Carlo solver is used as a reference for the spectral properties. Then the same scheme is used with the computationally less demanding perturbative spin-polarized fluctuation-exchange solver in combination with the Disordered Local Moment approach, and photoemission spectra are calculated within the one-step model. It is shown that the formation of local magnetic moments in gamma-Mn is very sensitive to the value of Hund's exchange parameter. Comparison with the experimental photoemission spectra demonstrates that gamma-Mn is a strongly correlated system, with the Hubbard band formation, which cannot be described by the perturbative approach. However, minor change of parameters would transform it into a weakly correlated system.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database